/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonLazyImage.h
Note: that this is cleared out automatically if/when a new material is established on the brush. You must call this function again after doing so if the new material has a texture param.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=LazyImage) void SetMaterialTextureParamName ( [FName](API\Runtime\Core\UObject\FName) TextureParamName )